Method for interaction between devices, position determining method, electronic device, and chip system

A method for interaction between devices comprising:

• sending, by a first electronic device, a first sound wave signal by using a first speaker;
• sending, by the first electronic device, a second sound wave signal by using a second speaker, wherein the first sound wave signal and the second sound wave signal are used to determine relative position information between second electronic devices and the first electronic device;
• receiving, by the first electronic device, the relative position information between a second electronic device and the first electronic device sent by the second electronic device, wherein the relative position information is determined based on a time difference between first moment and a second moment, a distance between the first speaker and the second speaker, and a sampling frequency of a microphone of the second electronic device, wherein the first moment is a moment at which the second electronic device receives the first sound wave signal, the second moment is a moment at which the second electronic device receives the second sound wave signal, and wherein the time difference is determined based on a difference between quantities of sampling points at which the microphone of the second electronic device samples the first sound wave signal and the second sound wave signal, wherein the difference between quantities of sampling points is calculated by performing correlation calculation on the first sound wave signal and the second sound wave signal after converting the first sound wave signal and the second sound wave signal to a same frequency band, and wherein the relative position is determined by comparing the difference between quantities of sampling points with a preset sampling point value that is positively correlated with the distance between the first speaker and the second speaker and the sampling frequency of the microphone;
• and
• interacting, by the first electronic device with the second electronic device based on the relative position information.

An electronic device, comprising one or more processors, a memory, and a display, wherein

• the memory and the display are coupled to the one or more processors, the memory stores computer program code for execution by the one or more processors to perform operations comprising:
• receiving a first sound wave signal sent by a first electronic device by using a first speaker;
• receiving a second sound wave signal sent by the first electronic device by using a second speaker, wherein the first speaker is different from the second speaker;
• and
• determining a relative position between the second electronic device and the first electronic device based on a time difference between first moment and a second moment, a distance between the first speaker and the second speaker, and a sampling frequency of a microphone of the second electronic device, wherein the first moment is a moment at which the second electronic device receives the first sound wave signal, the second moment is a moment at which the second electronic device receives the second sound wave signal, and wherein the time difference is determined based on a difference between quantities of sampling points at which the microphone of the second electronic device samples the first sound wave signal and the second sound wave signal, wherein the difference between quantities of sampling points is calculated by performing correlation calculation on the first sound wave signal and the second sound wave signal after converting the first sound wave signal and the second sound wave signal to a same frequency band, and wherein the relative position is determined by comparing the difference between quantities of sampling points with a preset sampling point value that is positively correlated with the distance between the first speaker and the second speaker and the sampling frequency of the microphone.